Keen Smell. The catcus has advantage on Wisdom (Perception) checks that rely on smell.
Pounce. If the catcus moves at least 20 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 12 Strength saving throw or be knocked prone. If the target is prone, the catcus can make one bite attack against it as a bonus action.
Thorny Skin. If a character makes a physical attack on the catcus with a short range weapon they must make a DC 10 Dexterity saving throw to avoid the thorn, and take 1d4 piercing damage if fail.
Bite. Melee Weapon Attack: +5 to hit, reach 15 ft., one target. Hit: 1d12 + 2 piercing damage.
Claw. Melee Weapon Attack: +5 to hit, reach 15 ft., one target. Hit: 1d10 + 2 slashing damage.
Description
The catcus is a large cat creature, about 20 ft tall, and with skin like that of a cactus - tough, green, and thorny. It generally does not attack unless threatened or its eggs are in danger. Lays eggs about 8 feet in diameter that are grouped in the sand and very valuable to harvest.